package util;



import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {
			 public static String stringToMD5(String plainText) {
		         byte[] secretBytes = null;
		         try {
		                secretBytes = MessageDigest.getInstance("md5").digest(
		                     plainText.getBytes());
		         } catch (NoSuchAlgorithmException e) {
		             throw new RuntimeException("没有这个md5算法！");
		         }
		         String md5code = new BigInteger(1, secretBytes).toString(16);//转换成16进制
		       for (int i = 0; i < 32 - md5code.length(); i++) {
		         //如果产生的数据长度不是32，则前面补0
		             md5code = "0" + md5code;
		         }
		         return md5code;
		     
		   

			 }}
